Where I live, my university has different module definitions:
1 module = 3 to 8 credits, depending on how tough it is and how long it spans.
1 credit equals 30 hours of study.
Let me give you one piece of advice: don't put too much hay on your fork or you'll be sorry.. For me, doing 7 modules per year is fine and dandy. However, a 'regular student' usually gets around 12 modules per year, which is completely crazy (that's 60 hours per week study).
If you're a smart and regular student and you've had no problems in high school, then sure, go ahead and take ~10 modules per year, but for me it was a different story: I've had nothing but bad grades in high school and I've always struggled to keep up.
Let me just show you my study history:
1st year: 14 modules taken, 2 modules passed, 12 modules passed after re-exams
2nd year: 11 modules taken, 3 modules passed, 9 modules passed after re-exams
3rd year: 7 modules taken, 4 modules passed
4th year: 5 modules taken, 4 modules passed, 1 module passed after re-exams
How many modules you take will depend on how well and successful you study, how hard the modules are, how much outside help you get, how social you are (believe me, connections help), how motivated and how disciplined you are (giving up certain things just to pass your modules is a sour apple to bite, but a rewarding one). If you are going to take up 7 modules, I think you can do fine, but keep up your steady study rhythm, make sure you understand as much as possible from your modules and don't slack!
Schedule a meeting with your department's learning trajectory adviser before you make up your module selection for this year! They will know best how to estimate what is realistically doable and what is not.
I hope it helps!